Sandhornøy Bridge (Norwegian: Sandhornøy bru) is a cantilever bridge that crosses the Tverrsundet strait between the mainland and the island of Sandhornøya in the municipality of Gildeskål in Nordland county, Norway. The bridge is 374 metres (1,227 ft) long and the longest of the 3 spans is 154 metres (505 ft). Sandhornøy Bridge was opened in 1989 as an arm off of Norwegian County Road 17. The bridge is a single-cell prestressed concrete box girder bridge that was built using the balanced cantilever method.